三合板的一般弹性理论

一.引言 本文所指之三合板是一种轻质板材,在航空工业上近年来有广泛的应用。板由三层材料构成:外层为二硬薄钣(金属薄钣),夹心为较轻软之材料(如泡状醋酸赛璐珞、软木、或蜂巢状金属材料)。前者称为表钣,后者称为夹心,表钣与夹心胶合成一综合板。三合板之形变与应力之计算在十多年来曾引起力学家与工

GENERAL EQUATIONS OF SANDWICH PLATES UNDER TRANSVERSE LOADS AND EDGEWISE SHEARS AND COMPRESSIONS

Non-linear differential equations have been developed for the calculation of the deflections and buckling loads of Sandwich plates subjected to transverse loads and edgewise shears and compressions.The Sandwich plate consists of two thin metal face sheets bonded to a light slab-the core. The core is taken to have zero moduli as deformations in its own plane. This appears to give an adequate representation of behavior of many core materials.Some previous theories are shown to be special cases of this more general theory. The essence of non-linearity are shown through the dicussian of core properties and action of interface-and-core forces. The restriction of some special forms of displacements of practical interest has been studied and the existence of nonlinear element in the bending problem is clarified. The relative merit of using large bending deflection theory instead of the small bending deflection theory in the faces is given.